This book summarizes Undersea acoustic communications have drawn a lot of attention recently as their uses start to transition from military to commercial. The acoustic properties of the ocean are characterized by their tremendous complexity and dynamic nature. The parameters such as; depth, temperature, salinity, location, time of day, and season of the underwater medium influences the acoustic signal propagation. However, these medium parameters are varying arbitrarily depending upon shallow and deep-water divisions of the ocean. In addition to the medium parameters, the characteristics of...

This book summarizes, Now a days, the population increases day by day. The road transports are used mostly. Most preferable road transport Vehicles are Vehicles, containers, cars etc., The main aim of this project is to provide the safety to the passengers and as well as Vehicles. Now a days we are often seen that major reasons for road accidents are over speed, fire accidents and driver's negligence. So, we are trying to overcome these problems through our project by using the fire detection, accident detection and alcohol sensing for drivers. if in case any accidents occur it sends instant...